Improvement in cold-air ducts for hot-air furnaces



N. N. MANN. GOLD-AIN-DUcTs'FONHOT-AINFUNNAcEs. No.173,1z9.

Patented Feb. 8, 1876.

l 12 van 207'.-

NJETES. PHOTO-UTMOGRAPHER, WASHINGTON. 11C.

- the original feature of this invention.

UNITED STATES NEWTON M. MANN, OF ROCHESTER, NEW YORK. Y

PATENT OFFICE.

IMPROVEMENT IN coLD-AIR Duc'rs FoR Hor-AIR FuRNAcEs.

Specification forming part of Letters Patent No. 173,129, dated February8, 1876; application led November 29,1875.

To all whom t mag/concern:

Be it known that I, NEWTON M. MANN, of Rochester, county of Monroe,State of New York, have invented Cold-Air Duets of Heaters and Furnaces,of which the following is a specification: A

The device referred to is to be known as The King of the Winds, anautomatic reg nlator of the drafts of furnaces and other heaters.

The opening A represents the mouth of the duct, at which the air isordinarily received; B, the continuation of the duct to the furnace.

It is commonly found that when the wind blows from a direction oppositethat in which the mouth of the duct is turned the action of the furnaceis more or less reversed and hot,air drawn out through the duct. Theprompt arrest of this tendency by a self-acting valve, which closes theoutward passage and at the same time opens another passage, throughwhich the furnace can be Supplied with air, is This valve E is hung onpivots near its center, so that, when at rest, it just drops of its ownweight and forms a part of the side of the duct. The half toward themouth of theduct serves only for equipoise, and the duct behind thispart is ceiled up. The outward suction 0f a wind blowing from adirection opposite that to which the4 mouth of the duct is turned drawsthis valve'up so as to entirely cut off the outward passage G, and, bythe same movement, opens another passage,` F, through which the supplyof air maybe freely kept up to the fur-- To complete the regulation ofthe draft in the cold-air duct the valve O is added. It is 'nearlybalanced by the weight D suspended on a bent rod, and equalizes thesupply of air by partially closing the duct under pressure of the windblowing in.

The principle of this valve is not new, and the claim of originality ismade only on its combination with the valve E, for the purpose j hereinset forth. v

I disclaim any application of this appliance to a stove-pipe orfire-draft of any sort.

I claim as my invention--k 1. The vself-acting valve E, substantially asdescribed, in combination with the duct B, to prevent an outwardandprovide for an inward current of air when the draft of the wind isoutward. v

2.v The combination of the self-acting valve E with the self-actingvalve C and the ductA B, for the purpose of regulating the supply of airto the heating-chamber of furnaces, steam or other heaters, as above setforth.

NEWTON M. MANN.

